(阅读理解) Suggestions for Online Shopping It is good to know what you're looking for when you start shopping, so you don't buy things that you don't need. Also, remember how much you want to spend and don't go over your limit. The shopping cart may be virtual, but that credit card bill you get at the end of month is 100% real. Read the reviews. It will save you a lot of disappointment. It always helps to read the reviews because people love to complain about products. Listen to them! They'll save you a lot of time and money. Otherwise you will just have to send the item back. Check for hidden costs before you buy. The $20 T-shirt that you buy could turn into a $40 T-shirt if the shipping charges are high. Check if you can return the item and if you have to pay the postage. It is better to know now than be unpleasantly surprised later,（单选题）What must you check before you buy an article?